INVOLUTE GEARING Russian patent published in 2000 - IPC

FIELD: mechanical engineering, applicable in power gearings. SUBSTANCE: in an involute gearing the relation between the parameters of engagement input ((SV_s)_in)^0,5 and output ((SV_s)_out)^0,5 is selected proceeding from the following condition; (H₁/H₂)^0,25((SV_s)_out)^0,5/((SV_s)_in)^0,5= 1,0-1,7, where H₁/H₂ - ratio of tooth surface hardnesses of the drive and driven wheels; S = S_fr/(ΔP_b+0,1W_s)^0,5; S_fr - edge contact friction path with due account made for precision of manufacture and deformation under load W_s; V_s - relative speed in edge contact; ΔP_b - difference of pitches of the gear contacting by the tooth edge and mating gear in the edge contact phase. Gearing engagement factor ε_k in the involute gearing is selected from the following condition: ε_k= ε_αε_βk≥1,05, where ε_αk,ε_βk - profile and longitudinal engagement factors with due account made for wear in the edge contact phase on path S_fr. Elimination of the edge contact on path S_fr is accomplished by modification of the points or roots of the teeth. EFFECT: enhanced jamming load (wear resistance), reduced loss and vibration activity. 3 cl, 2 dwg